Display Device Metal Protrusions Stabilize Power Voltage
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Solution Overview
Problem
The instability of power source voltages in display devices makes it difficult to regulate the brightness of light emitters with high accuracy.
Innovation Solution
A display device configuration with a thin-film transistor layer, light emitter layer, and sealing layer on a substrate, featuring metal protrusions and resin protrusions that stabilize the power source voltages by overlapping power-source trunk wires, ensuring accurate brightness regulation of light emitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two kinds of power source voltage are supplied to pixel circuits, then the light emitter can be driven, but the brightness cannot be regulated with high accuracy due to voltage instability
Solution Approach 1:
A capacitor is introduced as an intermediary component between the power source voltage line and the pixel circuit. This capacitor acts as a local energy storage device that smooths out voltage fluctuations, providing stable power supply to the pixel circuit and enabling accurate brightness regulation of the light emitter.
Solution Approach 2:
The capacitor is positioned in advance within the pixel circuit to preemptively compensate for voltage instability. By having the capacitor ready and connected before voltage fluctuations occur, the system can maintain stable operation without requiring reactive corrections.
2Productivity
If power source voltage lines are extended to all pixel circuits, then all pixels can be driven, but voltage instability occurs making brightness regulation inaccurate
Solution Approach 1:
Instead of relying on a single distant power source, capacitors are distributed locally within each pixel circuit. This local energy storage approach ensures that each pixel receives stable voltage independently, maintaining brightness regulation accuracy across the entire display while enabling full operational productivity.
Data Source
AI summary
A display device according to an aspect of the disclosure includes a first metal protrusion being in contact with a first power-source trunk wire, and a second metal protrusion being in contact with a second power-source trunk wire. A first bank defining the end of an organic sealing film includes the first metal protrusion, the second metal protrusion, and a first resin protrusion. The first resin protrusion overlaps the first and second metal protrusions. The first resin protrusion has a frame shape.