Flexible Display Module Transparent Conductive Layer Bending Region
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Solution Overview
Problem
Current pad bending technology for narrow-frame and frameless display screens requires multiple mask processes, increasing manufacturing complexity and cost due to the need for EBA, EBB etching, and filling processes in the bending region.
Innovation Solution
A flexible display module with a first transparent conductive layer and an optional second transparent conductive layer, spaced apart by an insulating layer, where the bending region includes a groove filled with an organic planarization layer, simplifying the manufacturing process by reducing the number of mask processes and eliminating the need for EBA and EBB etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If pad bending technology is used to extend the bending region, then the screen-to-body ratio is improved, but the manufacturing process complexity increases due to multiple mask processes
Solution Approach 1:
The patent merges the touch electrode layer and driving circuit layer into a single transparent conductive layer, eliminating the need for separate mask processes for each layer. This integration maintains the bending region functionality while simplifying the manufacturing process by reducing the number of masking steps required.
Solution Approach 2:
The transparent conductive layer serves multiple functions simultaneously: it acts as both the touch electrode layer and the driving circuit layer. This multi-functionality allows the single layer to perform the roles of multiple layers, thereby reducing manufacturing complexity while maintaining the extended bending region capability.
2Area of stationary object
If EBA and EBB etching processes are performed in the bending region, then the bonding region is reduced, but the manufacturing cost increases
Solution Approach 1:
The patent extracts the complex etching processes (EBA and EBB) from the manufacturing sequence by designing a structure that does not require these processes. The groove structure in the bending region is formed without needing additional etching steps, thereby reducing manufacturing cost while maintaining the reduced peripheral area benefit.
Solution Approach 2:
The groove structure in the bending region is designed and formed in advance during the main manufacturing process, eliminating the need for subsequent EBA and EBB etching processes. This preliminary structuring achieves the peripheral area reduction without incurring additional manufacturing costs.
3Manufacturing precision
If multiple mask processes are added for EBA and EBB etching, then the bonding region is optimized, but the number of manufacturing processes increases
Solution Approach 1:
The patent combines the formation of the groove structure with the main manufacturing process flow, eliminating the need for separate EBA and EBB etching processes. This merging maintains bonding region optimization while improving manufacturing efficiency by reducing the total number of process steps.
Data Source
AI summary
Embodiments of the present disclosure provide a flexible display module, a method for manufacturing the flexible display module, and a flexible display device, which relate to the field of display technology and can simplify the manufacturing process of the flexible display module. The flexible display module includes: a flexible display panel, and a first transparent conductive layer disposed on the light exit side of the flexible display panel. The flexible display panel includes a main display region, a bending region, and a driving circuit region. The main display region includes a pixel array layer. The first transparent conductive layer includes a first touch electrode located in the main display region, a driving circuit located in the driving circuit region, a first touch electrode lead electrically connected to the first touch electrode and the driving circuit, respectively, and a wiring electrically connecting the pixel array layer and the driving circuit.