Pixel Circuit Layout for Uniform Display Panel Initialization
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Solution Overview
Problem
Existing display devices face inconsistencies in initialization signals due to voltage drops along signal lines, affecting the performance of pixel circuits in different regions of the display panel.
Innovation Solution
The display panel incorporates a pixel circuit with an oxide semiconductor transistor and a silicon transistor, where the active layer of the first initialization transistor is connected to the active layer of the second initialization transistor through a first connection wire, ensuring that at least a portion of the area of the first connection wire and the active layer of the oxide semiconductor transistor are located on the same layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate signal line is disposed to apply the initialization signal to the initialization transistor from an integrated chip, 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 extracts the initialization signal provision function from the peripheral driving circuit in the frame area and relocates it to a shared initialization transistor within the pixel circuit. This removes the need for separate initialization signal lines extending from the integrated chip, thereby eliminating voltage drop issues and signal inconsistency across the display panel.
Solution Approach 2:
The shared initialization transistor serves multiple pixel circuits simultaneously, providing initialization signals to multiple driving transistors through the connection wire. This multi-functional approach replaces the need for individual initialization signal lines for each pixel circuit, reducing overall signal line complexity while maintaining signal consistency.
2Reliability
If multiple separate signal lines are used to provide initialization signals to each pixel circuit, then each pixel circuit can be initialized independently, but the number of signal lines increases and manufacturing complexity increases
Solution Approach 1:
The patent merges multiple initialization signal provisions into a single shared initialization transistor that serves multiple pixel circuits. The connection wire connecting the active layers of initialization transistors creates a unified initialization network, reducing the number of separate signal lines and simplifying the manufacturing process while maintaining signal uniformity across all pixel circuits.
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.