Display Panel Bezel Reduction via Vertical Bonding Terminals
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Solution Overview
Problem
Display panels face challenges in achieving narrow bezels due to the bonding process with flexible circuit boards, which requires a certain width for the bezel on the bonding area, limiting the screen-to-body ratio.
Innovation Solution
The display panel design includes a base substrate with substrate via holes that allow driving signal lines and bonding terminals to be electrically connected on different surface sides, enabling the bonding terminals to be disposed in the display area perpendicular to the base substrate plane, thus reducing the bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If bonding terminals are disposed on the edge of the display panel for bonding with flexible circuit boards, then bonding is achieved, but the bezel width cannot be reduced
Solution Approach 1:
The bonding terminals are disposed perpendicular to the base substrate plane, extending from the display area toward the flexible circuit board. This vertical arrangement in the third dimension allows bonding to occur without occupying horizontal bezel space, thereby reducing bezel width while maintaining bonding functionality
Solution Approach 2:
The display panel structure is divided into distinct functional layers: the base substrate with display area, the bonding terminals extending vertically from the display area, and the flexible circuit board bonded to the terminals. This segmentation allows the bonding function to be separated from the display area, enabling narrow bezel design
2Length of moving object
If bonding terminals are disposed in the display area perpendicular to the base substrate plane, then bezel width is reduced, but signal transmission path becomes more complex
Solution Approach 1:
The bonding terminals are nested within the display area footprint, extending vertically from the base substrate through the display area without expanding the horizontal boundaries. This nesting approach allows the signal transmission path to be contained within the display area, avoiding increased complexity in the horizontal plane
Data Source
AI summary
The present disclosure discloses a display panel and a display device. The display panel includes: a base substrate, including a plurality of substrate via holes located in a display area of the display panel; and a plurality of driving signal lines and a plurality of bonding terminals, respectively located on different sides of the base substrate. At least one of the plurality of driving signal lines is electrically connected to at least one of the plurality of bonding terminals through the substrate via hole(s).