Display Panel Pixel Circuits with Shared Initialization Wiring
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Solution Overview
Problem
In existing display devices, the inconsistency of initialization signals due to voltage drop along signal lines from the integrated chip (IC) leads to variations in signal strength across different regions of the display panel, necessitating additional signal lines and affecting signal uniformity and reliability.
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 separate signal lines are used to apply initialization signals from the IC to each pixel circuit, then the initialization signal can be provided to each pixel circuit, but voltage drop along the signal lines causes inconsistency between initialization signals near the IC terminal and those far away from the IC terminal
Solution Approach 1:
The patent merges the function of separate initialization signal lines into a shared signal line by connecting initialization transistors of adjacent pixel circuits in series. This allows a single initialization signal line to serve multiple pixel circuits, reducing the total number of signal lines while maintaining signal consistency through the series connection architecture that minimizes voltage drop variations
Solution Approach 2:
The initialization transistor acts as an intermediary component that enables signal sharing between multiple pixel circuits. By placing initialization transistors in series connection and using them as intermediaries to transfer the initialization signal, the patent eliminates the need for separate dedicated signal lines to each pixel circuit while maintaining reliable signal distribution
2Area of stationary object
If multiple separate signal lines are disposed to provide initialization signals to different regions, then signal coverage is improved, but the signal line density increases and manufacturing complexity increases
Solution Approach 1:
The patent combines multiple initialization signal lines into a single shared line that serves the entire display panel. By connecting initialization transistors in series across different pixel circuits, the initialization signal can be distributed to all regions through one line, reducing wiring complexity and manufacturing difficulty while maintaining full signal coverage
Solution Approach 2:
The shared initialization signal line performs the function of multiple separate lines by utilizing the series-connected initialization transistors as signal distribution nodes. This universal approach allows a single line to initialize pixel circuits across the entire display area, eliminating the need for region-specific signal lines and simplifying the manufacturing process
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.