Electroluminescent Display Low-Potential Contact Round Shape
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Solution Overview
Problem
Conventional electroluminescent display devices experience current density concentration at the contact area when low-potential power is supplied, leading to heat generation and potential melting of polarizing films, causing color changes.
Innovation Solution
The design incorporates a low-potential contact portion with a round corner shape at the end portions of its lateral surfaces adjacent to the low-potential power pad, which distributes the current evenly and reduces heat generation by preventing localized concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a low-potential power is supplied from a low-potential power supply pad, then power can be delivered to the display device, but current density becomes concentrated at the contact area causing heat generation
Solution Approach 1:
The low-potential contact portion is designed with a round corner shape instead of sharp corners. This curvature distributes the current flow path and reduces current density concentration at the contact area, thereby minimizing heat generation while maintaining power delivery capability
2Power
If current density is concentrated at the contact area, then power transmission is efficient, but the polarizing film melts and changes color
Solution Approach 1:
The rounded corner shape of the low-potential contact portion distributes current density evenly, preventing localized overheating that would cause polarizing film melting and color changes, thus maintaining film reliability
Solution Approach 2:
The contact portion has a specific round corner shape configuration at its ends, creating a localized geometric feature that modifies current distribution characteristics in the critical area adjacent to the power pad, protecting the polarizing film from thermal damage
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
This solution effectively lowers current density and reduces heat in the contact portion and pad, preventing polarizing film melting and color changes, thereby enhancing the stability and performance of the electroluminescent display device.
Implementation Method 1
when a low-potential power is supplied from a low-potential power supply pad, a current density is concentrated at the contact area, whereby heat is generated
Data Source
AI summary
Disclosed is an electroluminescent display device which is capable of preventing a current density from being concentrated when low-potential power is supplied from a low-potential power supply pad, wherein the electroluminescent display device includes a display panel including a plurality of pixels, a pad portion provided in the edge of the display panel, and configured to include a low-potential power pad supplied with low-potential power, and a low-potential contact portion for electrically connecting the low-potential power pad with the plurality of pixels, wherein the low-potential contact portion has a round shape.