OLED Pixel Driving Circuit Merging Reset and Compensation
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Solution Overview
Problem
Existing pixel driving circuits in OLED display technology face challenges in improving switching performance without compromising resolution, often requiring dual-gate transistors which can negatively impact display resolution.
Innovation Solution
The proposed pixel driving circuit incorporates a data write sub-circuit, driving sub-circuit, reset sub-circuit, light emitting control sub-circuits, auxiliary function sub-circuit, and storage sub-circuit, where the auxiliary function sub-circuit performs both threshold compensation and reset functions, simplifying the circuit and enhancing resolution by using a single control signal line for multiple functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual-gate transistors are used to improve switching performance, then switching performance is improved, but display resolution deteriorates
Solution Approach 1:
The patent merges the reset function and threshold compensation function into a single auxiliary function sub-circuit controlled by one control signal line. This integration eliminates the need for separate control lines that would be required if dual-gate transistors were used, thereby maintaining high display resolution while achieving reliable switching performance through the combined functional approach.
2Adaptability or versatility
If multiple control signal lines are used to achieve comprehensive functionality, then circuit functionality is improved, but device complexity increases
Solution Approach 1:
The auxiliary function sub-circuit is designed with multi-functionality, where a single control signal line simultaneously controls both the reset operation and threshold compensation. This universal control approach allows the circuit to achieve comprehensive functionality without increasing the number of signal lines, thus reducing device complexity while maintaining adaptability.
3Reliability
If more transistors are added to improve circuit performance, then switching performance is improved, but leakage current increases
Solution Approach 1:
By merging the reset and threshold compensation functions into a single auxiliary function sub-circuit, the patent reduces the total number of transistors required in the pixel driving circuit. This consolidation minimizes the potential sources of leakage current while still achieving reliable switching performance through the integrated circuit design.
Data Source
AI summary
The disclosure provides a pixel driving circuit and a display panel, and belongs to the field of display technology. In the pixel driving circuit, the data write sub-circuit is configured to write a data voltage to a first electrode of the driving sub-circuit in response to a first scan signal; the auxiliary function sub-circuit is configured to compensate a threshold voltage of the driving transistor; the reset sub-circuit is configured to initialize a first electrode of the light emitting device to be driven in response to a reset control signal, and the second light emitting control sub-circuit transmits the initialization signal to a second electrode of the driving sub-circuit in response to a second light emitting control signal; the first light emitting control sub-circuit is configured to write a first power voltage to the first electrode of the driving transistor in response to a first light emitting control signal.