Flexible Display Substrate Segmentation for Compact Housing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a challenge in reducing the size of display device frames while maintaining the structural integrity and functionality, particularly in flexible display devices where the substrate needs to be bent for housing in electronic devices, and existing methods for manufacturing organic electroluminescence devices on glass substrates followed by lamination with flexible back plates are inefficient.
Innovation Solution
The display device comprises an insulating substrate with distinct areas, a wiring substrate, and a supporting substrate attached on the opposite side, with the supporting substrate not overlapping the bend area, allowing for efficient bending and housing without compromising the display panel's structural integrity or increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the substrate is bent to house the pad on the rear side for reducing frame size, then the frame size is reduced, but the structural integrity and reliability are compromised
Solution Approach 1:
The substrate is divided into a display area and a non-display area, with the pad and wiring substrate positioned in the non-display area. This segmentation allows the display area to maintain structural integrity while the non-display area accommodates the bent configuration for housing the pad on the rear side.
Solution Approach 2:
A wiring substrate is introduced as an intermediary component between the pad and the display area. This wiring substrate is connected to the pad and extends to the display area, allowing the pad to be positioned on the rear side while maintaining electrical connections and structural stability.
2Reliability
If a supporting substrate is added to maintain structural integrity during bending, then the reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The wiring substrate serves dual functions: it provides electrical connections between the pad and display area, and it acts as a supporting structure during bending. By merging these two functions into a single component, the need for an additional dedicated supporting substrate is eliminated, reducing device complexity and manufacturing cost.
Solution Approach 2:
The wiring substrate is designed to perform multiple functions: electrical connection and mechanical support. This multi-functionality reduces the overall number of components needed in the display device, simplifying the structure and reducing manufacturing complexity while maintaining structural integrity during bending.
3Area of stationary object
If the pad is positioned on the rear side for compact housing, then the frame size is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The pad and wiring substrate are positioned and connected in the non-display area before the final assembly steps. This preliminary positioning allows for easier manufacturing as the components are already in their final locations, reducing the complexity of subsequent assembly processes while enabling compact frame design.
Data Source
AI summary
According to one embodiment, a display device includes an insulating substrate that includes a first area, a second area adjacent to the first area, and a third area adjacent to the second area, a wiring substrate mounted at a position overlapping the third area on a surface side of the insulating substrate, and a supporting substrate attached to the insulating substrate on the other surface side of the insulating substrate, which is opposite to the surface side, wherein the second area is located between the first area and the third area, and the supporting substrate is provided so as not to overlap the second area.