Flexible Display Driving Device Mounting Orientation
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Solution Overview
Problem
Flexible display devices face contact inferiority issues due to stress from curvature when driving devices are mounted directly onto bent substrates, leading to suboptimal picture quality with issues like dark lines at edge regions.
Innovation Solution
Mounting driving devices onto the planar surface of a flexible display device instead of its curved surface, ensuring that the driving device is not subjected to stress from the substrate's curvature, thereby maintaining optimal contact and preventing picture quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the driving device is mounted on the curved surface of the flexible substrate, then the device can be integrated directly onto the display panel, but contact inferiority occurs due to stress from curvature
Solution Approach 1:
The patent applies different mounting orientations to different parts of the driving device based on the local curvature characteristics of the substrate. Specifically, the long sides of the driving device are mounted along the curved surface while the short sides are mounted on the planar surface, allowing each part of the device to adapt to the local geometric conditions and minimize stress-induced contact inferiority.
Solution Approach 2:
The patent transitions from a two-dimensional curved surface mounting problem to a three-dimensional solution by utilizing both the curved surface and the planar surface of the substrate. By mounting the driving device across both surfaces with different orientations, the patent effectively adds a dimensional aspect to the mounting strategy, allowing the device to accommodate the curvature while maintaining reliable contact.
2Adaptability or versatility
If the flexible substrate is bent to form a curved surface, then the display device achieves flexibility and portability, but stress is applied to mounted devices causing image defects
Solution Approach 1:
The patent recognizes that different regions of the substrate experience different stress conditions when bent. By orienting the driving device such that its long sides follow the curved surface and short sides remain on the planar surface, the mounting strategy adapts to the local stress distribution, minimizing the harmful effects of curvature-induced stress on image quality.
3Reliability
If the driving device is mounted with long sides along the curved surface, then contact inferiority is prevented, but mounting orientation becomes more complex
Solution Approach 1:
The patent employs an asymmetric mounting orientation for the driving device, where the long sides are aligned with the curved surface and the short sides are aligned with the planar surface. This asymmetric configuration optimizes contact quality by adapting to the curved geometry of the flexible substrate while maintaining a systematic and reproducible mounting approach.
Data Source
AI summary
Disclosed is a flexible display device capable of preventing contact inferiority with a driving device when the driving device is mounted onto the flexible display device bent in one direction. The flexible display device includes: a substrate having a display region and a dummy region, and forming a curved surface by being bent in one direction; and one or more driving devices mounted onto the dummy region of the substrate, wherein the driving device is mounted such that short sides thereof are disposed along the curved surface of the substrate, and long sides thereof are disposed on a planar surface of the substrate.