Integrated Source Capacitor Electrode for Crosstalk Reduction
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Solution Overview
Problem
Display devices face challenges in preventing horizontal crosstalk, which degrades image quality by causing coupling capacitance between different electrodes, leading to inefficiencies in light emission and overall display performance.
Innovation Solution
The display device incorporates a specific configuration where the source electrode and second capacitor electrode of the first transistor are integrally formed, minimizing the area of the capacitor and increasing its capacitance, while the second capacitor electrode extends to connect with the first electrode in a third metal layer, reducing coupling capacitance and preventing horizontal crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the capacitor area is increased to reduce coupling capacitance, then horizontal crosstalk is reduced, but the pixel area is consumed and device complexity increases
Solution Approach 1:
The source electrode of the first transistor and the second capacitor electrode are integrally formed as a single structure, eliminating the need for separate electrodes and reducing the overall pixel area while maintaining the capacitor's electrical function
Solution Approach 2:
The capacitor structure utilizes vertical stacking with the first capacitor electrode in the first metal layer and the second capacitor electrode in the active layer, effectively using the third dimension (vertical space) to increase capacitance without expanding the horizontal pixel area
2Object-affected harmful factors
If the capacitor area is increased to reduce coupling capacitance, then horizontal crosstalk is reduced, but device complexity increases
Solution Approach 1:
The source electrode and second capacitor electrode are merged into a single integral structure, reducing the number of discrete components and simplifying the electrode configuration while maintaining the necessary electrical connections
Solution Approach 2:
The integrated electrode structure serves dual functions: as the source electrode for the first transistor and as the second capacitor electrode, eliminating the need for separate structures and reducing overall device complexity
Data Source
AI summary
A display device comprises a first voltage line included in a first metal layer on a substrate and extending in a first direction, a first transistor electrically connected to the first voltage line and comprising a source electrode included in an active layer on the first metal layer and a gate electrode included in a second metal layer on the active layer, and a first capacitor electrically connected between the gate electrode of the first transistor and the source electrode of the first transistor. The first capacitor comprises a first capacitor electrode included in the first metal layer and electrically connected to the gate electrode of the first transistor, and a second capacitor electrode included in the active layer. The second capacitor electrode and the source electrode of the first transistor are integrally formed with each other.