Flexible Display Device Bezel Width Reduction via Vertical Circuit Routing
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Solution Overview
Problem
Flexible display devices have a wide bezel width due to the bending of the flexible circuit board, which increases the device's size and manufacturing complexity, and higher production costs.
Innovation Solution
The flexible display device design involves bending the substrate's bending part to minimize thickness and bezel width by positioning the driving IC and protection cap on one flexible circuit board, allowing for reduced bezel width and simplified manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible circuit board is bent to connect to the pad part, then the electrical connection is achieved, but the bezel width increases
Solution Approach 1:
The flexible circuit board is bent along a bending line to extend in the thickness direction of the display panel, utilizing the third dimension (vertical direction) rather than expanding in the horizontal plane. This dimensional transition allows electrical connection without increasing bezel width, as the circuit board wraps around the side surface of the lower substrate vertically.
2Reliability
If the flexible circuit board is bent to connect to the pad part, then the electrical connection is achieved, but the device complexity increases
Solution Approach 1:
The flexible circuit board is designed as a thin, flexible film that can be bent along a predetermined bending line. This flexibility allows the circuit board to adapt to the three-dimensional structure of the display panel, connecting to the pad part on the rear surface without requiring complex rigid structures or additional mounting components, thereby simplifying manufacturing.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Disclosed is a flexible display device. The flexible display device includes a display panel configured to include a first substrate that includes a plurality of pixels and a second substrate that is facing-coupled to the first substrate, and a first flexible circuit board connected to the first substrate. A driving IC which supplies a driving signal to the display panel is mounted on the first flexible circuit board. The first substrate includes a display part covered by the second substrate and configured to include the plurality of pixels, a non-display part provided near the display part and coupled to the second substrate, a bending part configured to extend from one side of the non-display part, and bent at a certain curvature, and a pad part connected to one side of the first flexible circuit board.