Display Device Protruding Pattern Crack Prevention
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Solution Overview
Problem
The formation of holes in display devices to expose electronic modules can lead to crack propagation in the display panel and input sensors, compromising the reliability of the device.
Innovation Solution
A display device design that includes a display layer with a hole area and a planarization layer, where the input sensor layer features a protruding pattern part with insulating layers, such as a base, sensing, and cover insulating layers, to minimize crack propagation during hole formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If holes are formed to expose electronic modules, then accessibility to electronic modules is improved, but crack propagation occurs in display panel and input sensor
Solution Approach 1:
A protruding pattern part is formed in advance around the hole area before the hole is created. This protruding structure serves as a pre-prepared stress distribution mechanism that prevents crack propagation when the hole is subsequently formed to expose the electronic module.
Solution Approach 2:
The protruding pattern part acts as an intermediary structure between the hole edge and the display panel/input sensor. It absorbs and distributes the stress generated during hole formation, preventing direct stress transmission that would cause cracks in the display panel and input sensor.
2Reliability
If protruding pattern part is added to input sensor layer, then crack propagation is minimized, but device complexity increases
Solution Approach 1:
The protruding pattern part is localized only in the hole area where stress concentration occurs, rather than modifying the entire input sensor layer. This localized approach provides crack prevention functionality while minimizing overall structural complexity and maintaining simplicity in other regions of the device.
Data Source
AI summary
Provided display device includes a display layer including a display area and a hole area which is disposed adjacent to the display area and in which a through-hole is defined and an input sensor layer disposed on the display layer and including a flat part including a conductive layer and at least one insulating layer and a protruding pattern part including the at least one insulating layer and provided to correspond to the hole area. Therefore, cracks that occur when a through-hole is formed may be reduced then the reliability and durability of the display device have been improved.