OLED Pixel Driving Circuit Simplifies Wire Routing
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Solution Overview
Problem
Existing pixel driving circuits for OLED display panels face high power consumption, complex wire routing, and low production yield due to the complexity of signal control lines and power supply loops.
Innovation Solution
A pixel driving circuit comprising a control sub-circuit, a charging sub-circuit, and a driving sub-circuit, where the control sub-circuit controls the first thin film transistor to charge the charging sub-circuit, and the charging sub-circuit provides voltage to the driving sub-circuit to drive the light-emitting sub-circuit, simplifying the circuit structure by reducing the number of signal control lines and power supply loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing pixel driving circuit uses multiple control signal lines and power supply loops, then the driving function is achieved, but the wire routing becomes complicated and production yield decreases
Solution Approach 1:
The patent merges multiple control functions into a single control signal line G_N. The control sub-circuit integrates the functionality of multiple transistors (52, 53, 54) that were previously controlled by separate signal lines, allowing all control operations to be achieved through one unified control line, thus simplifying wire routing and improving production yield
Solution Approach 2:
The control sub-circuit is designed to perform multiple functions using a single control signal. The same control line G_N controls both the writing stage (charging) and the light-emitting stage through the control sub-circuit's internal transistor configuration, making the control mechanism universal and eliminating the need for separate control lines for different operations
2Reliability
If the existing pixel driving circuit uses multiple control signal lines and power supply loops, then the driving function is achieved, but power consumption increases
Solution Approach 1:
The patent combines multiple power supply loops into a simplified power delivery path. By integrating the control sub-circuit and charging sub-circuit, the patent reduces the number of active power loops that need to be managed simultaneously, thereby reducing overall power consumption while maintaining the necessary driving function
Solution Approach 2:
The patent extracts and eliminates redundant power supply paths and control signal lines from the existing circuit. By removing unnecessary components and loops (such as the fourth thin film transistor and its associated control line S1), the patent reduces power consumption while preserving the essential driving functionality through the optimized sub-circuit configuration
3Ease of operation
If the existing pixel driving circuit uses complex signal control lines, then the driving control is achieved, but the production yield is low
Solution Approach 1:
The patent merges multiple control functions into a single control signal line G_N. The control sub-circuit integrates the functionality of multiple transistors (52, 53, 54) that were previously controlled by separate signal lines, allowing all control operations to be achieved through one unified control line, thus simplifying wire routing and improving production yield
Solution Approach 2:
The patent segments the circuit into functional sub-circuits (control sub-circuit, charging sub-circuit, driving sub-circuit) that can be independently designed and manufactured. This segmentation allows for standardized manufacturing processes and improves production yield while maintaining ease of operation through clear functional boundaries
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces power consumption, simplifies wire routing, and improves production yield by minimizing the number of signal lines and enhancing the stability and uniformity of light emission.
Implementation Method 1
a first end of the storage capacitor is connected with the first node, a second end of the storage capacitor is connected with the third node
Data Source
AI summary
A pixel driving circuit includes a control sub-circuit, a charging sub-circuit, a driving sub-circuit and a light-emitting sub-circuit, the control sub-circuit is used to control a first thin film transistor to charge the charging sub-circuit, and the charging sub-circuit is used to provide a voltage to the driving sub-circuit to drive the light-emitting sub-circuit to emit light.