Display Device Corner Waterproofing via Bonding Layer Extension
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Solution Overview
Problem
Display devices with curved designs face challenges in maintaining waterproofing and reliability, particularly at corner portions where traditional bonding layers and waterproofing structures may fail to effectively seal, leading to potential moisture infiltration and structural integrity issues.
Innovation Solution
A display device design featuring a display module with a corner portion and an input-sensing member that includes a body portion and an extension, where the extension does not overlap with the display panel, and a bonding layer that extends beyond the corner portion, combined with a waterproof filling member to seal gaps between waterproof members, enhancing the structural integrity and waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bonding layers and waterproofing structures are used at corner portions, then manufacturing is simpler, but waterproofing reliability deteriorates due to potential moisture infiltration and structural integrity issues
Solution Approach 1:
The bonding layer is segmented into multiple parts: a first bonding layer covering the display panel and a second bonding layer extending beyond the corner portion to a third bonding layer. This segmentation allows each part to perform its specific function - the first bonding layer provides general adhesion while the extended second and third bonding layers specifically address waterproofing at the corner portion, thereby improving waterproofing reliability without requiring a completely new structure
Solution Approach 2:
The bonding layer structure transitions from a two-dimensional planar layer to a three-dimensional extended structure by projecting the second bonding layer beyond the corner portion and forming the third bonding layer at the extended position. This dimensional change creates an overlapping configuration that provides enhanced waterproofing protection at the vulnerable corner area while maintaining manufacturing feasibility
2Reliability
If the input-sensing member extension does not overlap with the display panel, then waterproofing is improved by preventing moisture infiltration paths, but the device structure becomes more complex
Solution Approach 1:
The input-sensing member is segmented into a body portion that overlaps with the display panel and an extension portion that projects beyond the corner portion without overlapping the display panel. This segmentation creates a distinct separation between the sensing function (body portion) and the waterproofing/structural support function (extension portion), allowing the extension to prevent moisture infiltration paths while maintaining clear functional boundaries
Solution Approach 2:
The extension of the input-sensing member acts as an intermediary element between the display panel and the external environment. By extending beyond the corner portion, it creates a protective barrier that mediates against moisture infiltration without directly contacting the display panel, thus preventing moisture paths while maintaining a clear functional distinction
Data Source
AI summary
A display device has a first area, and a second area that extends from the first area and has a bent shape, the display device including a display module including a display panel, which has a corner portion in the second area, an input-sensing member on the display panel and including a body portion, which overlaps with the display panel, and an extension, which extends from the body portion, is in the second area, and does not overlap with the display panel, and a first bonding layer between the display module and the input-sensing member, wherein an edge of the extension extends beyond an edge of the corner portion.