Side Wall Electrode Display Device for Reduced Bezel Area
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Solution Overview
Problem
Current display device manufacturing methods face challenges in ensuring reliable electrical connections between display panels and circuit boards, particularly when the circuit boards are disposed on the side surfaces of the panels, which can lead to reduced connection reliability and increased bezel areas.
Innovation Solution
The proposed solution involves a display device design with a substrate having side wall electrodes and connection electrodes on the side surfaces, where the connection electrode overlaps more with the side wall electrode than with the signal line, and a grinding process is used to form the side wall electrodes with a thickness less than the signal line, enhancing electrical contact reliability. Additionally, an adhesive member and a sealing member are used to ensure secure connections between the circuit board and the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the circuit board is disposed on the side surface of the display panel, then the display area is widened, but the connection reliability between the display panel and circuit board is reduced
Solution Approach 1:
The invention moves the circuit board from the top surface to the side surface of the display panel, utilizing the side surface dimension for electrical connections. This dimensional transition allows the display area on the top surface to be maximized while maintaining connection functionality through side-mounted electrodes and circuit boards.
Solution Approach 2:
The connection electrode is formed within a groove on the side surface of the display panel, creating a nested structure where the electrode is embedded in the substrate. This nesting approach protects the connection electrode while maintaining compact side-surface mounting.
2Reliability
If pad parts are disposed on the top surface of the display panel, then electrical connections are established, but the bezel area increases
Solution Approach 1:
The invention extracts the electrical connection function from the top surface pad parts and relocates it to the side surface. By taking out the connection functionality from the top surface, the bezel area is reduced while electrical connections are maintained through side-mounted connection electrodes and circuit boards.
3Reliability
If the connection electrode overlaps more with the side wall electrode than with the signal line, then electrical contact reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The electrical connection path is segmented into distinct components: the signal line on the top surface, the side wall electrode on the side surface, and the connection electrode in the groove. This segmentation allows each component to be optimized independently while maintaining overall connection reliability through their overlapping arrangement.
Data Source
AI summary
A display device including a substrate including: a top surface, a bottom surface, and a plurality of side surfaces connecting the top surface and the bottom surface; a signal line disposed on the top surface; a sidewall electrode in electrical contact with the signal line and disposed on a first side surface of the side surfaces; and a connection electrode in electrical contact with the sidewall electrode and disposed on the first side surface.