Display Panel Conductive Sealing Member Electrical Connection
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Solution Overview
Problem
Existing display panel technologies face challenges in enhancing electrical connection characteristics between circuit boards and signal lines, particularly in reducing the bezel area and achieving a strong structural design.
Innovation Solution
A display panel design featuring a first and second display substrate with a non-conductive sealing member and a conductive sealing member, where the conductive sealing member is disposed inside the non-conductive sealing member, and a connection pad is coupled to the side surface of the substrates, along with a signal line and voltage supply line configuration that includes an auxiliary electrode to improve electrical connections and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing structure is used, then the manufacturing process is simple, but the electrical connection characteristics between circuit board and signal line are poor
Solution Approach 1:
The sealing member is divided into two distinct functional layers: a non-conductive sealing member for structural sealing and a conductive sealing member for electrical connection. This segmentation allows each layer to specialize in its primary function, improving electrical connection characteristics while maintaining manufacturing feasibility through sequential application processes.
Solution Approach 2:
The conductive sealing member serves dual purposes: it provides electrical connection between the circuit board and signal line, and simultaneously maintains the sealing function alongside the non-conductive sealing member. This multi-functionality improves electrical connectivity without requiring separate additional components.
2Area of stationary object
If the bezel area is reduced, then the display area is increased, but the structural strength and electrical connection reliability are compromised
Solution Approach 1:
The connection structure extends from the traditional planar interface to a three-dimensional configuration, with connection pads coupled to side surfaces of both substrates. This dimensional transition allows electrical connections to be established in the vertical dimension, enabling reduced bezel area while maintaining connection reliability through the conductive sealing member positioned at the side interface.
Solution Approach 2:
The conductive sealing member is disposed inside the non-conductive sealing member when viewed in plan view, creating a nested configuration. This nested structure allows the conductive element to be embedded within the sealing structure, maximizing space utilization in the reduced bezel area while ensuring reliable electrical connection through the nested conductive path.
3Reliability
If connection pads are coupled to side surfaces, then electrical connection is improved, but the manufacturing complexity increases
Solution Approach 1:
The connection pad formation process is merged with the existing substrate preparation and sealing member application processes. By integrating the connection pad coupling step into the established manufacturing workflow, the additional reliability benefit is achieved with minimal increase in overall manufacturing complexity.
Data Source
AI summary
A display panel includes a first display substrate, a second display substrate facing and spaced apart from the first display substrate, a non-conductive sealing member disposed between the first display substrate and the second display substrate and formed around an outer perimeter of the display panel, a conductive sealing member disposed inside the non-conductive sealing member when viewed in a plan view, and a connection pad coupled to a side surface of the first display substrate and a side surface of the non-conductive sealing member. A signal line includes an end portion overlapping with the non-conductive sealing member and connected to the connection pad.