Display Panel-Driver Bonding with Conductive Particle Groove Alignment
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Solution Overview
Problem
Existing electronic devices face challenges in achieving improved electrical connection characteristics between display panels and data drivers, particularly in ensuring stable and efficient electrical connectivity through conductive adhesive films.
Innovation Solution
The implementation of an adhesive layer with conductive particles between the display panel and data driver, where the data driver includes grooves or protrusions that align with the conductive particles to facilitate electrical connection, and the use of anisotropic conductive films to ensure precise alignment and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive adhesive film is used to electrically connect the display panel and data driver, then electrical connection is achieved, but the electrical connection characteristics are insufficient
Solution Approach 1:
The adhesive layer is constructed as a composite material combining adhesive resin with conductive particles (metal particles or carbon particles). This composite structure provides both adhesive bonding function and electrical conductivity, resolving the contradiction by integrating multiple functions into a single layered structure that achieves reliable electrical connection while maintaining bonding strength.
Solution Approach 2:
The data driver surface features localized grooves or protrusions that create concentrated contact points with the conductive particles. This local quality enhancement ensures that electrical connection occurs at specific high-contact-area regions, improving electrical connection characteristics while allowing the rest of the adhesive layer to maintain its bonding function.
2Productivity
If the distance between display panel and data driver is reduced to improve connection efficiency, then signal transmission improves, but alignment precision becomes more difficult to maintain
Solution Approach 1:
The grooves or protrusions are pre-formed on the data driver surface before bonding occurs. This preliminary action creates predetermined alignment features that guide the conductive particles into correct positions during the bonding process, ensuring alignment precision is maintained even when the overall distance between components is reduced.
Solution Approach 2:
The adhesive layer with conductive particles acts as an intermediary that bridges the display panel and data driver. The conductive particles within this intermediary layer can conform to the groove or protrusion features, providing tolerance for minor misalignments while still achieving reliable electrical connection, thus allowing reduced component spacing without sacrificing alignment precision.
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
Enhances electrical connection stability and efficiency between the display panel and data driver, allowing for improved signal transmission and reduced connection distances, thereby improving the overall performance of the electronic device.
Implementation Method 1
at least a conductive particle disposed inside the adhesive resin and in contact with and electrically connected to the display panel and the data driver
Data Source
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AI summary
An electronic device includes: a display panel including a first pad; a data driver including a second pad disposed to overlap the first pad in a thickness direction of the display panel and disposed on the display panel; and an adhesive layer disposed between the display panel and the data driver. The adhesive layer includes: an adhesive resin in contact with the display panel and the data driver; and a conductive particle disposed inside the adhesive resin and in contact with and electrically connected to the display panel and the data driver. The data driver includes a groove defined in a surface thereof facing the display panel, and a length of the groove in a first direction perpendicular to the thickness direction is smaller than or equal to a diameter of the conductive particle.