Display Panel Pixel Circuits with Cross-Connected Transistors
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Solution Overview
Problem
In existing display devices, the inconsistency of initialization signals due to voltage drop along signal lines from an integrated chip (IC) to distant pixel circuits leads to non-uniform signal distribution, requiring additional signal lines and increasing complexity.
Innovation Solution
The display panel integrates oxide semiconductor and silicon transistors with a connection wire connecting the active layers of initialization transistors, allowing signal transmission across different areas without significant voltage drops, reducing the number of signal lines, and simplifying the wiring process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate signal line is disposed to apply the initialization signal from an integrated chip to the initialization transistor, then the initialization signal can be provided to the pixel circuit, but voltage drop along the signal line causes inconsistency between the initialization signal near the IC terminal and far away from the IC terminal
Solution Approach 1:
The patent merges the initialization signal transmission function into the existing pixel circuit structure by using the source electrode of the initialization transistor as the signal reception node. This eliminates the need for separate dedicated signal lines from the integrated chip, as the initialization signal is now transmitted through the existing transistor source electrode connection, thereby reducing signal line complexity while maintaining consistent signal distribution.
2Area of stationary object
If additional signal lines are added to provide initialization signals to distant pixel circuits, then signal coverage is improved, but line density increases and resolution is reduced
Solution Approach 1:
The source electrode of the initialization transistor serves multiple functions: it acts as both the signal reception node for the initialization signal and as part of the pixel circuit's normal operation pathway. This multi-functional design eliminates the need for additional dedicated signal lines, maintaining full signal coverage across the display area without increasing line density, thereby preserving display resolution.
3Device complexity
If the initialization signal is provided through existing transistor connections rather than separate signal lines, then the number of signal lines is reduced, but the wiring process becomes more complex
Solution Approach 1:
The patent performs preliminary action by pre-configuring the initialization transistor's source electrode as the signal reception node during the transistor fabrication process itself. This preliminary setup integrates the signal transmission function into the transistor structure before final circuit assembly, eliminating the need for additional wiring steps and actually simplifying the overall manufacturing process despite the innovative connection method.
Data Source
AI summary
Display panel and display device are provided. The display panel includes a pixel circuit and a light-emitting element. The pixel circuit includes a driving transistor and an initialization transistor. The initialization transistor is configured to provide an initialization signal for a preset node. The preset node is a gate of the driving transistor, or an anode of the light-emitting element. The pixel circuit includes an oxide semiconductor transistor and a silicon transistor. An active layer of the oxide semiconductor transistor includes an oxide semiconductor, and an active layer of the silicon transistor includes silicon. The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit includes a first initialization transistor. The second pixel circuit includes a second initialization transistor. An active layer of the first initialization transistor is connected to an active layer of the second initialization transistor through a first connection wire.