Flexible Display Device with Overlapping Terminal Portions
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Solution Overview
Problem
Conventional cylindrical displays have a significant non-display portion (seam) that affects image quality when viewed from multiple directions, and there is a need to minimize this issue.
Innovation Solution
A flexible display device with a first edge and a second edge, where the first terminal portion is on the surface of one end portion and the second terminal portion is on the back face of the other end portion, overlapping each other, and an electronic circuit board is mounted to these terminal portions, allowing the device to be bent and reducing the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is bent to form a cylindrical shape, then the display can be viewed from multiple directions, but a significant non-display portion (seam) appears affecting image quality
Solution Approach 1:
The patent moves the terminal portions from the lateral edges of the display to the longitudinal edges by bending the display in the longitudinal direction. This dimensional repositioning allows terminals to be located at overlapping positions on the front and back surfaces, eliminating the need for lateral non-display portions and reducing seams when viewed from multiple directions.
Solution Approach 2:
The patent implements a nested structure where the terminal portions are positioned within the overlapping region of the bent display. The first terminal portion on the front surface and the second terminal portion on the back surface are nested in the same spatial region, allowing electrical connections to be made through the thickness of the bent display without creating visible seams.
2Ease of manufacture
If terminal portions are positioned at the edges of the display, then electrical connections can be made, but large non-display portions are required for wire routing
Solution Approach 1:
The patent repositions terminal portions from the lateral edges to the longitudinal edges of the display by bending it into a cylindrical shape. This allows terminal portions to overlap in the radial direction, enabling wire routing to occur through the thickness of the display rather than requiring large lateral non-display areas.
Solution Approach 2:
The patent utilizes the flexibility of the display to bend it into a cylindrical shape, allowing terminal portions to be positioned at overlapping locations. This flexible configuration enables compact wire routing through the thickness of the display, significantly reducing the area required for non-display portions compared to flat configurations.
3Manufacturing precision
If the display is bent into a cylindrical shape, then the seam is reduced, but the complexity of mounting electronic circuit boards increases
Solution Approach 1:
The patent implements a nested mounting structure where electronic circuit boards are mounted on both the front and back surfaces at the overlapping terminal portions. This nested arrangement allows electrical connections to be made through the thickness of the bent display, simplifying the mounting process compared to routing wires across the lateral edges of a flat display.
Solution Approach 2:
The patent changes the mounting dimension from lateral edge mounting in flat displays to radial/axial mounting in bent displays. Terminal portions are positioned at overlapping locations on the front and back surfaces, allowing circuit boards to be mounted in the radial direction with wires routed through the thickness, thereby reducing mounting complexity despite the bent configuration.
Data Source
AI summary
A display device with a first edge and a second edge, the first edge and the second edge extending in a same direction, the display device including a light-emitting layer, and an electronic circuit board, wherein the display device emits light toward a front side with the display device is bent as a first terminal portion disposed on a surface of an end portion on the first edge and a second terminal portion disposed on a back face of an end portion on the second edge facing one another, and the electronic circuit board includes a first surface mounted to the first terminal portion and a second surface opposite the first surface and mounted to the second terminal portion.