Alternating Pixel Circuit Transistors for Mini-LED Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mini light emitting diodes (mini-LEDs) require large electric currents, leading to poor stability and potential display failures due to the long-term working environment of driving transistors in pixel circuits.
Innovation Solution
A pixel circuit design that includes two driving transistors working alternately, controlled by switching transistors, to reduce the working period of each driving transistor, thereby enhancing stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mini-LEDs are used to achieve high contrast and good stability, then display quality is improved, but large electric current requirements cause driving transistors to deteriorate in stability
Solution Approach 1:
The pixel circuit divides the driving function into two separate driving transistors (first driving transistor and second driving transistor) that work alternately. This segmentation allows the driving task to be split, reducing the burden on each individual transistor and preventing overheating or excessive stress that would degrade stability over time.
Solution Approach 2:
The two driving transistors operate in alternating periods, with one transistor active while the other is inactive. This periodic action distributes the workload over time, allowing each transistor to rest during its inactive period, thereby improving overall reliability and reducing the risk of display failures.
2Productivity
If driving transistors work continuously to maintain display operation, then productivity is maintained, but stability deteriorates due to long-term working environment
Solution Approach 1:
The circuit implements periodic operation by alternating between two driving transistors. While one transistor is active and maintaining display operation, the other is in a resting state. This periodic alternation ensures continuous productivity while allowing individual transistors to recover, thereby improving stability.
Solution Approach 2:
The inactive driving transistor is temporarily discarded from the active duty cycle and allowed to recover during the period when the other transistor is active. This recovery period helps dissipate heat and reduce stress accumulation, improving long-term reliability without affecting continuous display operation.
Data Source
AI summary
A pixel circuit and a display panel are provided, which include a first driving transistor, a second driving transistor, a first switching transistor, and a second switching transistor. By controlling the first driving transistor and the second driving transistor to work alternately by the first switching transistor and the second switching transistor, work period of the first driving transistor and/or the second driving transistor can be reduced, being able to improve stability of the driving transistors.