OLED Flexible Display Pad Bending Glue-Free Support
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Solution Overview
Problem
The uneven thickness of glue in the pad bending region of OLED display panels leads to interference, wave warping, and potential disconnection of the circuit substrate during the bending process, affecting the quality and user experience of flexible display products.
Innovation Solution
The method involves a flexible display module that extends and bends from the first substrate to the second substrate with a gap without a filler, utilizing the flexibility and ductility of the touch panel to prevent interference and warping, and includes a polarizer covering only the capacitance region to maintain touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid glue is dispensed in the pad bending region with a thickness of 50-80 μm, then the pad bending region is protected, but the glue thickness becomes uneven after curing, resulting in gaps between the glue and film layer that cause display defects
Solution Approach 1:
The patent removes the MLC dispensing process entirely from the pad bending region. Instead of applying glue to the entire bending region, the solution extracts the harmful element (glue) from this area and replaces it with a flexible support structure that provides protection without causing thickness uniformity issues.
Solution Approach 2:
The patent applies different structural solutions to different regions: the pad bending region uses a flexible support structure without glue, while other regions may use traditional bonding methods. This local differentiation ensures that the problematic area receives specialized treatment to avoid glue-related defects.
2Reliability
If glue is applied in the entire pad bending region, then the region is protected, but the TP FPC position must cross the glue region, affecting touch panel flatness and user visual experience
Solution Approach 1:
The patent extracts the TP FPC routing from the glue region by providing a dedicated flexible support structure. This allows the touch panel to maintain its flatness while the TP FPC is properly supported in the bending region without interference from uneven glue.
3Stability of the object's composition
If glue is used in the bending region, then the pad bending is supported, but the uneven glue thickness interferes with other parts in the bending region, causing wave warping
Solution Approach 1:
The patent removes glue from the bending region and replaces it with a flexible support structure. This extraction eliminates the source of wave warping while maintaining the necessary support for the pad bending through the alternative flexible structure.
4Adaptability or versatility
If the circuit of the array substrate is not completely fixed due to uneven glue thickness, then the substrate is flexible, but the circuit is easy to be pulled and damaged during transportation
Solution Approach 1:
The patent extracts the circuit fixing function from the glue and provides it through a dedicated flexible support structure. This separation allows the substrate to remain flexible while the circuit is properly secured, preventing damage during transportation.
Data Source
AI summary
An OLED display screen and a method for manufacturing the same are provided. The OLED display screen includes a first substrate; a fastener disposed on a side of a surface of the first substrate; a second substrate disposed on a surface of the fastener far away from the first substrate; and a flexible display module extending and bent from a surface of the first substrate far away from the fastener to a surface of the second substrate far away from the fastener, wherein a gap without a filler is provided between the flexible display module and the fastener.