Pixel Driver Electrode Layout to Prevent Display Horizontal Stains
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Solution Overview
Problem
Existing display panels face issues with reliability due to poor connections between light emitting elements and pixel drivers, leading to potential horizontal stains and reduced display quality.
Innovation Solution
The display device incorporates light emitting elements with integral first electrodes overlapping first capacitor electrodes of pixel drivers, along with specific transistor and capacitor configurations, and a unique layout of light emitting and drive units to enhance electrical connections and reduce horizontal stains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first electrode of light emitting elements is made integral and overlaps with the first capacitor electrode of pixel drivers, then the display device can prevent horizontal stains and improve display quality, but the layout complexity and device structure become more constrained
Solution Approach 1:
The first electrode of the light emitting element and the first capacitor electrode of the pixel driver are made integral, forming a unified conductive structure. This merging eliminates the need for separate connection traces and reduces layout complexity while maintaining the electrical connection function. The integral structure ensures stable voltage supply to the light emitting element while preventing horizontal stains.
Solution Approach 2:
The first electrode serves dual functions: it acts as the anode for the light emitting element and simultaneously functions as the first capacitor electrode for the pixel driver. This multi-functionality reduces the number of separate components and simplifies the overall device structure while achieving both light emission and voltage storage functions.
2Reliability
If connecting electrodes are disposed between light emitting parts to extend from the first electrode, then electrical connection is improved, but the device structure becomes more complex
Solution Approach 1:
The connecting electrodes are disposed within the overlapping region between the light emitting parts, nesting the connection function within the existing electrode structure. This approach allows the connecting electrodes to be integrated into the overall device architecture without adding significant structural complexity, while ensuring reliable electrical connection between adjacent light emitting elements.
Data Source
AI summary
Disclosed is a display device which includes pixel drivers, each of which includes a first transistor switched by a voltage of a node and electrically connected between a second electrode and a second power supply line, a second transistor electrically connected between the node and a data line and switched by a write scan signal, and a capacitor including a first capacitor electrode electrically connected to the node and a second capacitor electrode electrically connected between the second power supply line and the first transistor. First electrodes of light emitting elements overlap each of the first capacitor electrodes of the pixel drivers.