OLED Panel Power Management for Compensation Efficiency
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Solution Overview
Problem
The high power consumption in external compensation circuits of organic electroluminescence display panels, which is a result of non-uniform threshold voltage and drifting issues, necessitates a more efficient power management solution to alleviate the Mura phenomenon.
Innovation Solution
A method involving a power-supply circuit in a driver chip for parameter acquisition and a power management chip for data compensation, allowing for high conversion efficiency in respective stages to reduce overall power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an external compensation circuit is added to the OLED display panel to alleviate the Mura phenomenon, then the display uniformity is improved, but the power consumption increases significantly
Solution Approach 1:
The patent divides the compensation process into two distinct stages: parameter acquisition stage and data compensation stage. Each stage uses a different power supply mode optimized for its specific requirements, thereby reducing overall power consumption while maintaining display uniformity
Solution Approach 2:
The patent implements dynamic power supply switching between two modes: constant current power supply during parameter acquisition and constant voltage power supply during data compensation. This dynamic adaptation allows the system to optimize power consumption based on the operational stage
2Productivity
If constant voltage power supply is used during parameter acquisition, then the power conversion efficiency is low, but the parameter acquisition can be completed
Solution Approach 1:
The patent changes the power supply parameter from constant voltage to constant current specifically for the parameter acquisition stage, which improves power conversion efficiency during this critical phase while still completing the parameter acquisition task
3Loss of energy
If constant current power supply is used during data compensation, then the power conversion efficiency is high, but the current requirement is large
Solution Approach 1:
The patent applies periodic switching between different power supply modes: constant current power supply is used during parameter acquisition, then switches to constant voltage power supply during data compensation. This periodic action allows the system to leverage the high efficiency of constant current mode when needed while using constant voltage mode when large current would be problematic
Data Source
AI summary
The application discloses a method for powering an organic electroluminescence display panel, and a display device. When an external compensation circuit is acquiring parameters of respective sub-pixels in a display area of the organic electroluminescence display panel, the display area is powered using a power-supply circuit in a driver chip at high conversion efficiency, and thus high power consumption, to thereby lower power consumption in a parameter acquisition stage. While the external compensation circuit is performing data compensation to the respective sub-pixels in the display area of the organic electroluminescence display panel, the display area of the organic electroluminescence display panel is powered using the power management chip at high conversion efficiency to thereby achieve low power consumption in the data compensation stage.