Side Bonding Structure for Display Panel Bezel Reduction
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Solution Overview
Problem
Existing display devices face challenges in reducing the size of the bezel area, which limits the overall size reduction of the display device, and there is a need for improved contact reliability between the display panel and the flexible film in the bonding process.
Innovation Solution
A display device with a side bonding structure that includes a flexible film with a base film and a wiring electrode attached to the side surface of the display panel using an adhesion member, and a connection electrode that directly bonds to the pad electrode of the display panel to establish electrical connection, enhancing the bonding reliability and reducing the bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible film is bonded to the display panel using conventional methods, then the bonding process is simple, but the contact reliability between the flexible film and display panel is insufficient
Solution Approach 1:
The bonding structure is segmented into three distinct functional components: the adhesion member (first adhesive layer) for mechanical attachment, the connection electrode for electrical connection, and the wiring electrode on the flexible film. This segmentation allows each component to be optimized for its specific function, improving overall contact reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The adhesion member and connection electrode are merged into a single integrated component that performs both mechanical bonding and electrical connection functions simultaneously. This merging eliminates the need for separate bonding and electrical connection processes, improving reliability by ensuring both functions are achieved in one reliable interface while reducing structural complexity.
2Area of stationary object
If the flexible film is attached to reduce the bezel area, then the display area increases, but the visual inspection of the bonding state becomes difficult
Solution Approach 1:
The bonding structure is designed to extend partially onto the front surface of the display panel in addition to the side surface, creating a multi-dimensional configuration. This allows the connection electrode to be positioned where it can be visually inspected from the front, enabling quality inspection without increasing the bezel area, while still achieving compact side bonding.
3Area of stationary object
If the flexible film is securely attached to minimize bezel area, then the display area increases, but the bonding process becomes more complex
Solution Approach 1:
The adhesion member is pre-formed with the connection electrode integrated into it before the bonding process. This preliminary preparation allows the bonding step to simply involve placing the pre-assembled adhesion member between the flexible film and display panel, minimizing the actual bonding process complexity while achieving secure attachment and minimal bezel area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The side bonding structure improves contact reliability and minimizes the bezel area by allowing the flexible film to be securely attached to the display panel, increasing the display area while maintaining easy visual inspection of the bonding state for reliability.
Implementation Method 1
an adhesion member configured to attach the flexible film to the side surface of the display panel
Implementation Method 2
a connection electrode directly bonded to the pad electrode of the display panel and the wiring electrode of the flexible film to electrically connect the display signal line of the display panel to the wiring electrode of the flexible film
Data Source
AI summary
A display device includes a display panel which displays an image, the display panel including a display signal line and a pad electrode which extends from the display signal line, a flexible film from which a display signal is provided to the pad electrode of the display panel, the flexible film including a base film attached to a side surface of the display panel and including a front surface facing away from the side surface of the display panel, and a wiring electrode disposed on the front surface of the base film and, an adhesion member configured to attach the flexible film to the side surface of the display panel, and a connection electrode directly bonded to the pad electrode of the display panel and the wiring electrode of the flexible film to electrically connect the display signal line of the display panel to the wiring electrode.