Foldable Window Module Protrusion for Static Electricity Isolation
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Solution Overview
Problem
Foldable electronic devices face issues with static electricity ingress, leading to potential short-circuits and degradation of electrical and folding characteristics.
Innovation Solution
The design incorporates a window module with a protrusion portion that overlaps a separation area defined by an optical film and a bending cover layer, blocking the path of static electricity and preventing it from flowing into the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a foldable electronic device is designed without a protrusion portion to block static electricity, then the device structure remains simple and manufacturing is easier, but static electricity can flow into the device causing short-circuits and degradation of electrical characteristics
Solution Approach 1:
The window protective layer is segmented into a cover portion and a protrusion portion. The protrusion portion is separated from the main cover area and extends in the second direction to specifically block the static electricity ingress path, while the cover portion maintains the primary protective function. This segmentation allows the structure to address electrical reliability without significantly complicating the overall device design.
Solution Approach 2:
The protrusion portion acts as an intermediary element between the external environment and the internal electronic components. It specifically blocks the static electricity path before it can reach sensitive areas, serving as a protective mediator that prevents harmful electrical discharge without requiring complete structural redesign of the device.
2Reliability
If a protrusion portion is added to block static electricity, then electrical reliability is improved, but the window protective layer becomes more complex and harder to manufacture
Solution Approach 1:
The window protective layer is divided into functional segments: the cover portion for general protection and the protrusion portion for static electricity blocking. This segmentation allows each part to be optimized independently, with the protrusion portion being a simple extension that can be manufactured using standard layer deposition techniques without requiring complex multi-step processes.
Solution Approach 2:
The protrusion portion is designed with specific geometric parameters (extending in the second direction, overlapping the separation area) that can be controlled during manufacturing. By defining clear dimensional parameters and spatial relationships, the design allows for precise fabrication using conventional manufacturing methods while ensuring the protrusion effectively blocks the static electricity path.
3Reliability
If the protrusion portion overlaps the separation area, then static electricity blocking is effective, but the alignment precision requirements increase
Solution Approach 1:
The protrusion portion extends in the second direction (thickness direction) to create a three-dimensional blocking structure that overlaps the separation area. This dimensional approach allows the protrusion to effectively block static electricity paths without requiring extremely precise planar alignment, as the blocking function is achieved through the protrusion's extension into the thickness dimension where it intersects with the separation area.
Solution Approach 2:
The protrusion portion serves as an intermediary structure that bridges the cover portion and the separation area. By positioning the protrusion to overlap the separation area, it creates a protective barrier that tolerates moderate alignment variations while still effectively blocking static electricity ingress, thus reducing the stringency of alignment precision requirements.
Data Source
AI summary
An electronic device includes a display module including a display panel including a first area in which a pixel is disposed, a second area adjacent to the first area and bent with respect to an imaginary axis, a data line connected to the pixel, and a first line insulated from the pixel, an optical film, and a bending cover layer and a window module including a glass substrate and a window protective layer including a cover portion disposed on the glass substrate and a protrusion portion protruding from the cover portion. An end of the optical film and an end of the bending cover layer, which faces the end of the optical film, defines a separation area, the data line and the first line overlap the separation area when viewed in a plane, and the protrusion portion overlaps the first line in the separation area when viewed in a plane.