AMOLED Electrode Heat Dissipation via U-Shaped Metal Component
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Solution Overview
Problem
During the visible test (VT) of AMOLED display panels, increasing the input voltage to enhance picture luminance leads to heat generation in electrodes with small cross-sectional areas and high resistance, which can cause the glass frit layer to overheat and potentially be damaged, affecting encapsulation efficacy and display performance.
Innovation Solution
Incorporating a U-shaped metal component connected to the electrodes via a via hole, which acts as a heat conduction component to dissipate heat away from the electrodes, preventing excessive heat buildup on the glass frit layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the input voltage is increased to enhance picture luminance during VT test, then the luminance is improved, but heat is generated in the electrode causing the glass frit layer to be seared
Solution Approach 1:
A heat conduction component is introduced as an intermediary between the electrode and the glass frit layer. This component provides a dedicated thermal conduction path that directs heat away from the electrode-glass frit interface, preventing heat accumulation and searing of the glass frit layer while allowing the electrode to operate at higher temperatures for improved luminance
Solution Approach 2:
The thermal management function is segmented from the electrode structure by introducing a separate heat conduction component. This segmentation allows the electrode to focus on electrical function and luminance generation, while the dedicated heat conduction component handles thermal dissipation, enabling independent optimization of both functions
2Illumination intensity
If the input voltage is increased to enhance picture luminance during VT test, then the luminance is improved, but the encapsulation efficacy is degraded due to glass frit layer damage
Solution Approach 1:
The heat conduction component serves as a protective intermediary that intercepts and redirects heat away from the glass frit layer. This prevents thermal damage to the encapsulation structure, maintaining its integrity and efficacy even when high voltages are applied for luminance enhancement during VT testing
3Temperature
If a heat conduction component is added to dissipate heat from the electrode, then the glass frit layer is protected from overheating, but the device complexity increases
Solution Approach 1:
The heat conduction component is merged with the existing electrode structure by establishing electrical and thermal connections within the existing layered architecture. The component utilizes the same manufacturing layers and processes, combining the heat dissipation function with the existing electrode system rather than adding completely separate structures
Solution Approach 2:
The heat conduction component performs multiple functions: it provides thermal conduction path for heat dissipation, maintains electrical connection for current flow, and structurally integrates with the electrode and glass frit layer. This multi-functionality reduces the need for additional separate components, minimizing the increase in device complexity
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
Effectively conducts heat away from the electrodes, preventing the glass frit layer from overheating and ensuring the encapsulation integrity and display performance during the VT test, without altering the original layered structure of the AMOLED display panel.
Implementation Method 1
the electrode is connected to a heat conduction component; wherein the heat conduction component includes a U-shaped metal component located under the glass frit layer
Data Source
Figure 1A~1B
Figure 2A~3A
Figure 3B
AI summary
An Active Matrix Organic Light Emitting Diode (AMOLED) display panel is disclosed. The display panel includes first (1) and second (2) substrates, and a glass frit layer (3) bonding the first and the second substrates in an edge encapsulation area of the AMOLED display panel. The second substrate (2) includes an electrode (4) overlapped with the glass frit layer (3), and the electrode is connected to a heat conduction component (5).